@isTest
   private class TestCalculateFine {
      // Methods for testing
      static testMethod void verifyFine(){
    // Perform our data preparation.
     CalculateFine calFin = new  CalculateFine();
    test.startTest();
    
      Application__c app = calFin.getProxyObject();
    
      calFin.diff = 25;
      calFin.CFine();
      calFin.diff = 45;
      calFin.CFine();
      calFin.diff = 61;
      calFin.CFine();
    test.stopTest();
        
    
}

   }